1 /*-
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/i386/i386/legacy.c,v 1.63.2.1.4.1 2009/04/15 03:14:26 kensmith Exp $
30 */
31
32 /*
33 * This code implements a system driver for legacy systems that do not
34 * support ACPI or when ACPI support is not present in the kernel.
35 */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/bus.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/rman.h>
44
45 #include "legacyvar.h"
46
47 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
48 struct legacy_device {
49 int lg_pcibus;
50 };
51
52 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
53
54 static int legacy_identify(driver_t *, device_t);
55 static int legacy_probe(device_t);
56 static int legacy_attach(device_t);
57 static int legacy_print_child(device_t, device_t);
58 static device_t legacy_add_child(device_t, device_t, int, const char *, int);
59 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
60 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
61
62 static device_method_t legacy_methods[] = {
63 /* Device interface */
64 DEVMETHOD(device_identify, legacy_identify),
65 DEVMETHOD(device_probe, legacy_probe),
66 DEVMETHOD(device_attach, legacy_attach),
67 DEVMETHOD(device_detach, bus_generic_detach),
68 DEVMETHOD(device_shutdown, bus_generic_shutdown),
69 DEVMETHOD(device_suspend, bus_generic_suspend),
70 DEVMETHOD(device_resume, bus_generic_resume),
71
72 /* Bus interface */
73 DEVMETHOD(bus_print_child, legacy_print_child),
74 DEVMETHOD(bus_add_child, legacy_add_child),
75 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
76 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
77 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
78 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
79 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
80 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
81 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
82 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
83
84 DEVMETHOD_END
85 };
86
87 static driver_t legacy_driver = {
88 "legacy",
89 legacy_methods,
90 1, /* no softc */
91 };
92 static devclass_t legacy_devclass;
93
94 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, NULL, NULL);
95
96 static int
legacy_identify(driver_t * driver,device_t parent)97 legacy_identify(driver_t *driver, device_t parent)
98 {
99 /*
100 * Basically a static device, there's no point reinstalling it
101 * on rescan.
102 */
103 if (device_get_state(parent) == DS_ATTACHED)
104 return (0);
105 if (device_get_state(parent) == DS_INPROGRESS)
106 return (0);
107
108 /*
109 * Add child device with order of 11 so it gets probed
110 * after ACPI (which is at order 10).
111 */
112 if (BUS_ADD_CHILD(parent, parent, 11, "legacy", 0) == NULL)
113 panic("legacy: could not attach");
114 return (0);
115 }
116
117 static int
legacy_probe(device_t dev)118 legacy_probe(device_t dev)
119 {
120 #if 0 /* ACPI_ENABLE_PCI */
121 device_t acpi;
122
123 /*
124 * Fail to probe if ACPI is ok.
125 */
126 acpi = devclass_get_device(devclass_find("acpi"), 0);
127 if (acpi != NULL && device_is_alive(acpi))
128 return (ENXIO);
129 #endif /* ACPI_ENABLE_PCI */
130 device_set_desc(dev, "legacy system");
131 device_quiet(dev);
132 return (0);
133 }
134
135 static int
legacy_attach(device_t dev)136 legacy_attach(device_t dev)
137 {
138 device_t child;
139
140 /*
141 * Let our child drivers identify any child devices that they
142 * can find. Once that is done attach any devices that we
143 * found.
144 */
145 bus_generic_probe(dev);
146 bus_generic_attach(dev);
147
148 /*
149 * If we didn't see ISA on a pci bridge, create a
150 * connection point now so it shows up "on motherboard".
151 */
152 if (!devclass_get_device(devclass_find("isa"), 0)) {
153 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
154 if (child == NULL)
155 panic("legacy_attach isa");
156 device_probe_and_attach(child);
157 }
158
159 return 0;
160 }
161
162 static int
legacy_print_child(device_t bus,device_t child)163 legacy_print_child(device_t bus, device_t child)
164 {
165 struct legacy_device *atdev = DEVTOAT(child);
166 int retval = 0;
167
168 retval += bus_print_child_header(bus, child);
169 if (atdev->lg_pcibus != -1)
170 retval += kprintf(" pcibus %d", atdev->lg_pcibus);
171 retval += kprintf(" on motherboard\n"); /* XXX "motherboard", ick */
172
173 return (retval);
174 }
175
176 static device_t
legacy_add_child(device_t bus,device_t parent,int order,const char * name,int unit)177 legacy_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
178 {
179 device_t child;
180 struct legacy_device *atdev;
181 atdev = kmalloc(sizeof(struct legacy_device), M_LEGACYDEV,
182 M_NOWAIT | M_ZERO);
183 if (atdev == NULL)
184 return(NULL);
185 atdev->lg_pcibus = -1;
186
187 child = device_add_child_ordered(bus, order, name, unit);
188 if (child == NULL) {
189 kfree(atdev, M_LEGACYDEV);
190 }
191 else {
192 /* should we kfree this in legacy_child_detached? */
193 device_set_ivars(child, atdev);
194 }
195 return (child);
196 }
197
198 static int
legacy_read_ivar(device_t dev,device_t child,int which,uintptr_t * result)199 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
200 {
201 struct legacy_device *atdev = DEVTOAT(child);
202
203 switch (which) {
204 case LEGACY_IVAR_PCIDOMAIN:
205 *result = 0;
206 break;
207 case LEGACY_IVAR_PCIBUS:
208 *result = atdev->lg_pcibus;
209 break;
210 default:
211 return ENOENT;
212 }
213 return 0;
214 }
215
216 static int
legacy_write_ivar(device_t dev,device_t child,int which,uintptr_t value)217 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
218 {
219 struct legacy_device *atdev = DEVTOAT(child);
220
221 switch (which) {
222 case LEGACY_IVAR_PCIDOMAIN:
223 return EINVAL;
224 case LEGACY_IVAR_PCIBUS:
225 atdev->lg_pcibus = value;
226 break;
227 default:
228 return ENOENT;
229 }
230 return 0;
231 }
232
233 #ifdef notyet
234 /*
235 * Legacy CPU attachment when ACPI is not available. Drivers like
236 * cpufreq(4) hang off this.
237 */
238 static void cpu_identify(driver_t *driver, device_t parent);
239 static int cpu_read_ivar(device_t dev, device_t child, int index,
240 uintptr_t *result);
241 static device_t cpu_add_child(device_t bus, int order, const char *name,
242 int unit);
243 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
244
245 struct cpu_device {
246 struct resource_list cd_rl;
247 struct pcpu *cd_pcpu;
248 };
249
250 static device_method_t cpu_methods[] = {
251 /* Device interface */
252 DEVMETHOD(device_identify, cpu_identify),
253 DEVMETHOD(device_probe, bus_generic_probe),
254 DEVMETHOD(device_attach, bus_generic_attach),
255 DEVMETHOD(device_detach, bus_generic_detach),
256 DEVMETHOD(device_shutdown, bus_generic_shutdown),
257 DEVMETHOD(device_suspend, bus_generic_suspend),
258 DEVMETHOD(device_resume, bus_generic_resume),
259
260 /* Bus interface */
261 DEVMETHOD(bus_add_child, cpu_add_child),
262 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
263 DEVMETHOD(bus_print_child, bus_generic_print_child),
264 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
265 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
266 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
267 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
268 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
269 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
270 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
271 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
272 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
273 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
274
275 DEVMETHOD_END
276 };
277
278 static driver_t cpu_driver = {
279 "cpu",
280 cpu_methods,
281 1, /* no softc */
282 };
283 static devclass_t cpu_devclass;
284 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, NULL, NULL);
285
286 static void
cpu_identify(driver_t * driver,device_t parent)287 cpu_identify(driver_t *driver, device_t parent)
288 {
289 device_t child;
290 int i;
291
292 /*
293 * Attach a cpuX device for each CPU. We use an order of 150
294 * so that these devices are attached after the Host-PCI
295 * bridges (which are added at order 100).
296 */
297 for (i = 0; i <= mp_maxid; i++)
298 if (!CPU_ABSENT(i)) {
299 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
300 if (child == NULL)
301 panic("legacy_attach cpu");
302 }
303 }
304
305 static device_t
cpu_add_child(device_t bus,int order,const char * name,int unit)306 cpu_add_child(device_t bus, int order, const char *name, int unit)
307 {
308 struct cpu_device *cd;
309 device_t child;
310 struct pcpu *pc;
311
312 if ((cd = kmalloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
313 return (NULL);
314
315 resource_list_init(&cd->cd_rl);
316 pc = pcpu_find(device_get_unit(bus));
317 cd->cd_pcpu = pc;
318
319 child = device_add_child_ordered(bus, order, name, unit);
320 if (child != NULL) {
321 pc->pc_device = child;
322 device_set_ivars(child, cd);
323 } else
324 kfree(cd, M_DEVBUF);
325 return (child);
326 }
327
328 static struct resource_list *
cpu_get_rlist(device_t dev,device_t child)329 cpu_get_rlist(device_t dev, device_t child)
330 {
331 struct cpu_device *cpdev;
332
333 cpdev = device_get_ivars(child);
334 return (&cpdev->cd_rl);
335 }
336
337 static int
cpu_read_ivar(device_t dev,device_t child,int index,uintptr_t * result)338 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
339 {
340 struct cpu_device *cpdev;
341
342 if (index != CPU_IVAR_PCPU)
343 return (ENOENT);
344 cpdev = device_get_ivars(child);
345 *result = (uintptr_t)cpdev->cd_pcpu;
346 return (0);
347 }
348 #endif
349